Merge pull request #403 from mbta/just_erlang_elixir_upgrade

Upgrades Elixir and erlang versions

.github/workflows/elixir.yml

@@ -51,9 +51,11 @@ jobs:
         id: deps-cache
         uses: actions/cache@v2
         with:
-          path: deps
-          key: ${{ runner.os }}-mix-v2-${{ hashFiles('**/mix.lock') }}
-          restore-keys: ${{ runner.os }}-mix-v2-
+          path: |
+            deps
+            _build
+          key: ${{ runner.os }}-mix-v3-${{ hashFiles('.tool-versions') }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: ${{ runner.os }}-mix-v3-
       - name: Install dependencies (if needed)
         if: steps.deps-cache.outputs.cache-hit != 'true'
         run: mix deps.get

.tool-versions

@@ -1,3 +1,3 @@
-elixir 1.11.4-otp-23
-erlang 23.3.4.18
-nodejs 16.20.0
+elixir 1.17.3-otp-27
+erlang 27.1.1
+nodejs 20.18.0

Dockerfile

@@ -1,5 +1,5 @@
 # First, get the elixir dependencies within an elixir container
-FROM hexpm/elixir:1.11.4-erlang-23.3.4.18-alpine-3.16.2 AS elixir-builder
+FROM hexpm/elixir:1.17.3-erlang-27.1-alpine-3.19.4 as elixir-builder
 
 ENV LANG="C.UTF-8" MIX_ENV=prod
 
@@ -12,7 +12,7 @@ RUN mix local.hex --force && \
   mix do deps.get --only prod
 
 # Next, build the frontend assets within a node.js container
-FROM node:16.20-alpine as assets-builder
+FROM node:20-alpine3.19 as assets-builder
 
 WORKDIR /root
 ADD . .
@@ -36,9 +36,9 @@ COPY --from=assets-builder /root/priv/static ./priv/static
 RUN mix do compile --force, phx.digest, release
 
 # Finally, use an Alpine container for the runtime environment
-FROM alpine:3.16.2
+FROM alpine:3.19.4
 
-RUN apk add --update libssl1.1 ncurses-libs bash curl dumb-init \
+RUN apk add --update libstdc++ ncurses-libs bash curl dumb-init \
   && apk upgrade \
   && rm -rf /var/cache/apk
 

README.md

@@ -4,6 +4,21 @@ Document Viewer is a web application allowing users with permission to view docu
 
 [![Build Status](https://github.com/mbta/document_viewer/actions/workflows/elixir.yml/badge.svg)](https://github.com/mbta/document_viewer/actions/workflows/elixir.yml)
 
+## Testing Docker
+
+On MBTA machines docker for desktop is [not allowed](https://github.com/mbta/technology-docs/blob/main/rfcs/accepted/0010-docker-desktop-replacement.md). Instead you must first install Colma:
+
+```sh
+brew install colima docker
+colima start
+``
+
+Then you can test building the docker container by:
+
+```sh
+docker build . -t document_viewer; docker run document_viewer
+```
+
 ## Development
 
 To start your Phoenix server: