How do we casually create an Elixir community website with Phoenix?

How do we casually creat e an Elixir community websit
e with Phoenix? Ryotaro Imahashi (kokura.ex ) 10/15, 2021

Welcome to

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% tree -L 2 .(e.g. kokuraex/ ) ├── README.m d
├── ap p │ └── Dockerfil e └── docker-compose.yml /PX XFXJMMNBLFUIF1IPFOJYQSPKFDU EJSFDUPSZBOEQSFQBSFUIFEPDLFSGJMFTBT TIPXOPOUIFSJHIU "CPVUUIFQSPKFDUEJSFDUPSZ XFOBNFE lLPLVSBFYzUIJTUJNF /PUF 8FPNJUNFOUJPOJOHTFWFSBMGJMFT GPS FYBNQMF 3&"%.& HJUJHOPSF BOENPSF *OUIFGPMMPXJOHDIBQUFST UPP 1SFQBSFEPDLFSGJMFT

[app/Dockerfile ] FROM elixir:1.12.2-sli m WORKDIR /usr/src/ap p RUN apt-get
update -y && \ apt-get upgrade -y && \ apt-get install -y \ build-essential \ curl \ git \ gzip \ inotify-tools \ ssh \ sudo \ ta r RUN apt-get clea n RUN mix local.hex --force && \ mix local.rebar --forc e RUN mix archive.install hex phx_new 1.6.0 --forc e CMD [ "mix", "phx.server", "--no-halt" ] 1SFQBSFEEPDLFSDPNQPTFZNMBOE %PDLFSGJMFJTIFSF *UTQFDJGJFT1IPOFOJYWFSTJPO 1SFQBSFEPDLFSGJMFT [app/Dockerfile ] version: "3 " services : app : build: ./ap p volumes : - ./app:/usr/src/ap p ports : - "4000:4000 " stdin_open: tru e tty: tru e command: sh -c "mix phx.server --no-halt "

% docker compose build "GUFSQSFQBSFEEPDLFSGJMFT MFU`TFYFDVUF AEPDLFSDPNQPTFCVJMEA &YFDVUFAEPDLFSDPNQPTFCVJMEA

% docker compose run app mix phx.new . --app kokuraex
—no-ect o … The directory /usr/src/app already exists. Are you sure you want to continue? [Yn] y … Fetch and install dependencies? [Yn] y … "GUFSEPOFPGAEPDLFSDPNQPTFCVJMEA JOTUBMM1IPFOJY *OTUBMM1IPFOJYGSBNFXPSL

% tree -L 2 . ├── README.m d ├── ap
p │ ├── Dockerfil e │ ├── README.m d │ ├── _buil d │ ├── asset s │ ├── confi g │ ├── dep s │ ├── li b │ ├── mix.ex s │ ├── mix.loc k │ ├── pri v │ └── tes t └── docker-compose.ym l *OTUBMM1IPFOJYGSBNFXPSL … We are almost there! The following steps are missing : $ cd . Start your Phoenix app with : $ mix phx.serve r You can also run your app inside IEx (Interactive Elixir) as : $ iex -S mix phx.server 8FTBXUIFGPMMPXJOHNFTTBHF BOEDPOHSBUVMBUJPOT UIFJOTUBMMBUJPOXBTDPNQMFUFE "OEBUUIFNPNFOU UIFEJSFDUPSZUSFFJTTIPXOPO UIFSJHIU

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:kokuraex, KokuraexWeb.Endpoint , # Binding to loopback ipv4 address prevents access from other machines . # Change to `ip: {0, 0, 0, 0}` to allow access from other machines . - http: [ip: {127, 0, 0, 1}, port: 4000] , + http: [ip: {0, 0, 0, 0}, port: 4000] ,

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GJMFTBTTIPXOPOUIFSJHIU 4FUVQPG1IPFOJYGPSSFMFBTF [app/config/prod.exs ] … config :kokuraex, KokuraexWeb.Endpoint , - url: [host: "example.com", port: 80] , + http: [port: System.get_env("PORT")] , + url: [scheme: "https", host: "kokura-ex.herokuapp.com", port: 443] , + force_ssl: [rewrite_on: [:x_forwarded_proto]] , … [app/Dockerfile ] FROM elixir:1.12.2-sli m + ENV MIX_HOME=/root/.mix \ + MIX_ENV=prod \ + SECRET_KEY_BASE=${SECRET_KEY_BASE} \ + PORT=400 0 + COPY . /usr/src/ap p WORKDIR /usr/src/app "OZXBZ MFUTHPCBDLBMJUUMFCJU BOETUBSUXJUIUIFTFUVQJO1IPFOJYGPSSFMFBTF 8FGJSTUOFFEUPDSFBUFBTFDSFULFZCZSVOOJOHUIF DPNNBOEAEPDLFSDPNQPTFSVOBQQNJY QIYHFOTFDSFUA % docker compose run app mix phx.gen.secret [app/config/config.exs ] # Configures the endpoin t config :kokuraex, KokuraexWeb.Endpoint , url: [host: "localhost"] , + secret_key_base: System.get_env("SECRET_KEY_BASE") , …

4FUVQPG1IPFOJYGPSSFMFBTF (New file) [heroku.yml ] build : docker : web:
app/Dockerfile [docker-compose.yml ] … + environment:SECRET_KEY_BASE=“TooLongStrings……… ” stdin_open: tru e tty: tru e command: sh -c "mix phx.server —no-halt" 1MFBTFOPUFUIBUUIFTFDIBOHFTNBZQSFWFOUPVSMPDBM %PDLFSEFWFMPQNFOUFOWJSPONFOUGSPNSVOOJOHQSPQFSMZ *GTP XFTIPVMEUBLFUIFGPMMPXJOHTUFQT 3FXSJUFEPDLFSDPNQPTFZNMBTTIPXOPOUIFSJHIU XJUI4&$3&5@,&:@#"4&CFJOHBMPOHEVNNZUFYUPG ZPVSDIPJDF 8FDBOBMTPSFNPWFUIFATFDSFU@LFZ@CBTFAMJOFGSPN BQQDPOGJHEFWFYT *OUIFGVUVSF JUXPVMECFOJDFUPIBWFUXP%PDLFSGJMFT POFGPSEFWFMPQNFOUBOEPOFGPSSFMFBTF 8FPNJUBOFYQMBOBUJPOPGUIBUIFSF 0PQT XFGPSHPUPOFNPSFJNQPSUBOUUIJOH 8FTIPVMEDSFBUFBIFSPLVZNMGJMFBOEQVUJUJOUIFSPPU PGPVSQSPKFDUEJSFDUPSZ [app/config/dev.exs ] … code_reloader: true , debug_errors: true , - secret_key_base: “LongPreWrittenWtrings…………… ” watchers: [ …

/PUF 8FXJMMOPUFYQMBJOIPXUPDSFBUFB)FSPLVBDDPVOUIFSF*GZPVIBWFOUDSFBUFEBO BDDPVOUZFU QMFBTFSFGFSUPUIFPGGJDJBMXFCTJUFGPSFBTZUPGPMMPXJOTUSVDUJPOTUPHFU SFBEZ IUUQTEFWDFOUFSIFSPLVDPNDBUFHPSJFTCJMMJOH *UJTCFTUJGZPVBMTPJOTUBMM)FSPLV$PNNBOE-JOF*OUFSGBDF )FSPLV$-*
)FSPLV $-*NBLFTJUFBTZUPNBOBHF)FSPLVBQQTEJSFDUMZGSPNUIFUFSNJOBM5IFJOTUBMMBUJPO QSPDFTTJTIFSF IUUQTEFWDFOUFSIFSPLVDPNBSUJDMFTIFSPLVDMJ 4FUVQPG)FSPLV /PXJUTUJNFUPTFUVQ)FSPLV -FU`TMPHJOUP)FSPLVGSPNUIFUFSNJOBM % heroku login

/PX MFUTDSFBUFB)FSPLVQSPKFDUCZFYFDVUJOHUIF DPNNBOEAIFSPLVDSFBUFBXFTPNFBQQOBNFA *OUIFBXFTPNFBQQOBNFGJFME XFTIPVMEFOUFS UIFOBNFPGUIFBQQMJDBUJPOOBNFXFXBOU"OE UIJTTUSJOHXJMMCFEJSFDUMZJODPSQPSBUFEBTQBSUPG UIFBQQMJDBUJPO`TQVCMJD63-
"UUIFTBNFUJNF JUXJMMSFHJTUFSPVS)FSPLV SFQPTJUPSZUPUIFHJUSFNPUFSFQPTJUPSZ$IFDLJU PVUJOUIFAHJUSFNPUFADPNNBOE 8FMMBMTPOFFEUPBEEUIFTFDSFULFZXFDSFBUFE FBSMJFSUPUIF)FSPLVFOWJSPONFOUWBSJBCMFT -FU`TSFHJTUFSCZFYFDVUJPOUIFDPNNBOEAIFSPLV DPOGJHTFU4&$3&5@,&:@#"4&YYYYYYYYYYYYA 4FUVQPG)FSPLV % heroku create kokura-e x Creating ⬢ kokura-ex... don e https://kokura-ex.herokuapp.com/ | https:// git.heroku.com/kokura-ex.git % heroku config:set SECRET_KEY_BASE=xxxxxx x Setting SECRET_KEY_BASE and restartin g …

/PXMFUTHFUSFBEZUPEFQMPZB%PDLFSCBTFE QSPKFDUCZVTJOHUIF)FSPLV$POUBJOFS 3FHJTUSZNFDIBOJTN 'PSBNPSFEFUBJMFEFYQMBOBUJPOPGUIF)FSPLV $POUBJOFS3FHJTUSZ JUXPVMECFBHPPEIFMQFS UPSFBEUIFPGGJDJBMEPDVNFOUBUJPO IUUQT EFWDFOUFSIFSPLVDPNBSUJDMFTDPOUBJOFS SFHJTUSZBOESVOUJNF
)FSF XFXJMMGPDVTPOUIFFYFDVUJPOTUFQT )PXFWFS JUJTWFSZFBTZUPEP TPMFUTSVOUIF DPNNBOEPOUIFSJHIU 4FUVQPG)FSPLV % heroku container:logi n Login Succeeded % heroku stack:set containe r Setting stack to container... done

&OTVSFUIBUPVSDPEFJTBMMHJUDPNNJUUFE BOEUIFO SVOUIFDPNNBOEAHJUQVTIIFSPLV NZ@CSBODINBJOA 5IJTXJMMQVTIPVSGJMFT JODMVEJOHIFSPLVZNM UPUIF SFNPUFSFQPTJUPSZPG)FSPLV /PUFUIBUXFSFQMBDFUIFMFUUFSTlNZ@CSBODIzXJUI
UIFOBNFPGUIFCSBODIXFSFXPSLJOHPO*O EFUBJM UPEPBUSJBMQVTIUP)FSPLVXIFOXFSFJO UIFEFWFMPQNFOUHJUCSBODI XFOFFEUPTQFDJGZ TPNFUIJOHMJLFzNZ@CSBODINBJOz 0ODFXFWFEPOFUIJT NPWFUPUIFBQQEJSFDUPSZ BOEJUTUJNFGPSUIFQSPEVDUJPOSFMFBTFUJNF 3VOAIFSPLVDPOUBJOFSQVTIXFCABOEAIFSPLV DPOUBJOFSSFMFBTFXFCA %FQMPZ % cd ap p % heroku container:push we b … Your image has been successfully pushed. You can now release it with the 'container:release' command . $ heroku container:release we b Releasing images web to phx- containers... done % git push heroku my_branch:main

6OGPSUVOBUFMZ JGUIBUEPFTOUXPSL XIBUEPXFEP 5IFDPNNBOEAIFSPLVMPHTUBJMAXJMMIFMQVT $IFDLPVSMPHTBOEUSZUPTPMWFUIFQSPCMFN 5IFDBVTFPGUIFFSSPSNJHIUCF GPSFYBNQMF :PVNJHIUOPUMPHJOUP)FSPLVCZAIFSPLVDPOUBJOFSMPHJOA
TPUIFFSSPSBSPVOEBVUIJOUFSDFQUFEZPV :PVNJHIUPNJUUIFFOWJSPONFOUWBSJBCMFTSFMBUFEUP )FSPLV FJUIFSPO)FSPLVPSJOPVS%PDLFSGJMF :PVNJHIUGPSHFUUPHJUQVTI)FSPLVUIFDIBOHFEGJMFT 8FXJMMBTTVNFUIBUFWFSZUIJOHXFOUXFMMIFSF /PX MFUTTFFUIFTJUFQVCMJTIFEGPSUIFXPSMEUPTFF 8FDBOSVOUIFAIFSPLVPQFOADPNNBOEUPEJTQMBZ UIFTJUFJOUIFCSPXTFS0QFO4FTBNF %FQMPZ % heroku logs --tail % heroku open

%FQMPZ 8FXJMMMFUZPVLOPXUIFSFTVMUTTPPOMBUFS -FUTMPPLGPSXBSEUPJU cEFKBWV%

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(New file) [circleci/config.yml ] version: 2. 1 executors : machine-executor
: machine : image: ubuntu-2004:202107-0 2 orbs : heroku: circleci/heroku@1.2. 6 workflows : version: 2 build-deploy : jobs : - buil d - deploy : requires : - buil d filters : branches : only: mai n jobs : (Continue to next page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lCVJMEKPCzBOE TVCTFRVFOUMZNFSHFEJOUPUIFNBJOSFQPTJUPSZ UIFEFQMPZNFOUQSPDFTTJT FYFDVUFE5IFJNQMFNFOUBUJPOJTSFGMFDUFEJOUIFQSPEVDUJPOFOWJSPONFOU 1SFQBSFDJSDMFDJDPOGJHZNMJOMPDBM

(Continued from previous page ) jobs : build : executor
: name: machine-executo r steps : - checkou t - run : name: Build Docker container s command: | set - x docker-compose buil d - run : name: Mix deps.get & compil e command: | set - x docker-compose run app bash -c "mix deps.get " docker-compose run app bash -c "mix compile" *OUIFCVJMEKPCTUFQ WBSJPVTCVJMEPQFSBUJPOTBSF FYFDVUFEBTUIFOBNFTVHHFTUT*OUIJTTUFQ UFTUJOH BOEGPSNBUUJOHDIFDLTBSFBMTPDBSSJFEPVUEVSJOHUIJT TUBHFPGUIFQSPDFTT 'PSSFBTPOTPGQBQFSTQBDF TPNFJOEFOUBUJPOJOUIF ZNMGJMFIBTCFFOPNJUUFE 1SFQBSFDJSDMFDJDPOGJHZNMJOMPDBM - run : name: Npm install in assets director y command: | set - x docker-compose run app bash -c "cd assets && npm i " - run : name: Mix forma t command: | set - x docker-compose run app bash -c "mix format --check-formatted " - run : name: Mix tes t command: | set - x docker-compose run app bash -c "MIX_ENV=test mix test " - run : name: Compile asset s command: | set - x docker-compose run app bash -c "MIX_ENV=prod mix assets.deploy " - run : name: Mix releas e command: | set - x docker-compose run app bash -c "MIX_ENV=prod mix release " - run : name: Run Docker container s command: | set - x docker-compose up - d sleep 1 docker ps -f status=runnin g docker-compose log s - persist_to_workspace : (Continue to next page)

(Continued from previous page ) - persist_to_workspace : root: .
paths : - ./app/dep s - ./app/_buil d - ./app/pri v - ./app/assets / - run : name: Finish buil d command: | set - x echo "Finish build" QFSTJTU@UP@XPSLTQBDF JOUIFCVJMEKPC 'JMFTEJSFDUPSJFTSFRVJSFEGPSEFQMPZNFOUBSF TIBSFEWJBl8PSLTQBDFzCFUXFFOUIFCVJMEBOE EFQMPZKPCT EFQMPZ 5IJTJTXIFSFUIFQSPDFTTPGEFQMPZJOHUP)FSPLV UBLFTQMBDF5IFFOWJSPONFOUWBSJBCMFTFUUJOHFUD BSFEFTDSJCFEMBUFS 1SFQBSFDJSDMFDJDPOGJHZNMJOMPDBM deploy : executor : name: machine-executo r steps : - checkou t - attach_workspace : at: . - run : name: Check directories/file s command: | set - x pwd && ls -a && ls ap p - heroku/instal l - heroku/check-authenticatio n - run : name: Heroku container login, push, releas e working_directory: ap p command: | set - x ls - a heroku container:logi n heroku container:push web -a $HEROKU_APP_NAM E heroku container:release web -a $HEROKU_APP_NAM E - run : name: Finish deplo y command: | set - x echo "Finish deploy"

% heroku authorizations:creat e Creating OAuth Authorization... don e ..
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