Trying to get the 1.6 going on a couple of containers

NOTE: If you happen to end up here 'by the hands of Google' or some other (mis)fortune - please have a look at the solution

I use Cesar William Alvarenga's setup to get going - and I'm OK for the db, and for the build of phoenix and, heck, I'm even good for the docker-compose run --rm phoenix mix test like this (my app is named battery_rehab - but otherwise it's a 1:1)

√ battery.rehab % docker-compose run --rm battery_rehab mix test
Creating batteryrehab_battery_rehab_run ... done
Compiling 17 files (.ex)
Generated battery_rehab app
...

Finished in 0.4 seconds (0.2s async, 0.2s sync)
3 tests, 0 failures

Randomized with seed 941225
√ battery.rehab %

- but when I try to get that thing really going - it barf's a 139 at me!?

?139 battery.rehab % docker-compose run --rm battery_rehab mix phx.server
Creating batteryrehab_battery_rehab_run ... done
[info] Running BatteryRehabWeb.Endpoint with cowboy 2.9.0 at 127.0.0.1:4000 (http)
[debug] Downloading esbuild from https://registry.npmjs.org/esbuild-linux-arm64/-/esbuild-linux-arm64-0.12.18.tgz
[info] Access BatteryRehabWeb.Endpoint at http://localhost:4000
ERROR: 139
?139 battery.rehab %

Weird thing is that if I go into "bash-land" and do it by hand it doesn't even leave a erl_crash.dump behind?

√ battery.rehab % x bash      
Creating batteryrehab_battery_rehab_run ... done
root@d46b1158b169:/app# mix phx.server
[info] Running BatteryRehabWeb.Endpoint with cowboy 2.9.0 at 127.0.0.1:4000 (http)
[debug] Downloading esbuild from https://registry.npmjs.org/esbuild-linux-arm64/-/esbuild-linux-arm64-0.12.18.tgz
[info] Access BatteryRehabWeb.Endpoint at http://localhost:4000
Segmentation fault
root@d46b1158b169:/app# ls -la
total 32
drwxr-xr-x 14 root root   448 Sep 28 16:41 .
drwxr-xr-x  1 root root  4096 Sep 28 19:08 ..
-rw-r--r--  1 root root   159 Sep 28 16:41 .formatter.exs
-rw-r--r--  1 root root   815 Sep 28 16:41 .gitignore
-rw-r--r--  1 root root   703 Sep 28 16:41 README.md
drwxr-xr-x  4 root root   128 Sep 28 17:12 _build
drwxr-xr-x  5 root root   160 Sep 28 16:41 assets
drwxr-xr-x  7 root root   224 Sep 28 18:49 config
drwxr-xr-x 35 root root  1120 Sep 28 16:41 deps
drwxr-xr-x  6 root root   192 Sep 28 16:41 lib
-rw-r--r--  1 root root  2032 Sep 28 16:41 mix.exs
-rw-r--r--  1 root root 11454 Sep 28 16:41 mix.lock
drwxr-xr-x  5 root root   160 Sep 28 16:41 priv
drwxr-xr-x  5 root root   160 Sep 28 16:41 test
root@d46b1158b169:/app# 
root@d46b1158b169:/app# mix phx -v
Phoenix v1.6.0
root@d46b1158b169:/app# elixir -v
Erlang/OTP 24 [erts-12.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1]

Elixir 1.12.3 (compiled with Erlang/OTP 24)
root@d46b1158b169:/app# 
root@d46b1158b169:/app# iex -S mix phx.server
Erlang/OTP 24 [erts-12.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1]

[info] Running BatteryRehabWeb.Endpoint with cowboy 2.9.0 at 127.0.0.1:4000 (http)
[debug] Downloading esbuild from https://registry.npmjs.org/esbuild-linux-arm64/-/esbuild-linux-arm64-0.12.18.tgz
[info] Access BatteryRehabWeb.Endpoint at http://localhost:4000
Interactive Elixir (1.12.3) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> Segmentation fault
root@d46b1158b169:/app# ls -la

Savoing you the trip to "Cesar's" below you'll find the docker-compose.yml and Dockerfile:

# Dockerfile
FROM elixir:latest

RUN apt-get update && \
    apt-get install -y build-essential && \
    apt-get install -y postgresql-client && \
    apt-get install -y inotify-tools && \
    mix local.hex --force && \
    mix archive.install hex phx_new 1.6.0 --force && \
    mix local.rebar --force

ENV APP_HOME /app
RUN mkdir $APP_HOME
WORKDIR $APP_HOME

EXPOSE 3000
CMD ["mix", "phx.server"]

# docker-compose.yml
version: '3.6'

services:
  db:
    build: ./pg
    image: battery_rehab_db
    container_name: battery_rehab_db
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      PGDATA: /var/lib/postgresql/data/pgdata
    restart: always
    volumes:
      - ~/src/pg_data:/var/lib/postgresql/data

  battery_rehab:
    build: .
    image: battery_rehab_app:phoenix-1.6
    volumes:
      - ./src:/app
    ports:
      - "4000:4000"
    depends_on:
      - db

wdiechmann/phoenix_1.6_docker.md