chore(devcontainer): store Dialyzer PLTs in a volume.

.devcontainer/Dockerfile

@@ -47,7 +47,7 @@ RUN git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v${ASDF_VERSI
   echo '\nsource $HOME/.asdf/asdf.sh' >> ~/.zshrc
 
 WORKDIR /workspace/
-RUN mkdir _build deps .elixir_ls
+RUN mkdir -p _build deps .elixir_ls priv/plts
 
 # Install all the tools specified in the tool versions file.
 COPY .tool-versions /workspace/

.devcontainer/docker-compose.yml

@@ -10,6 +10,7 @@ volumes:
   app-elixir-ls: {}
   app-asdf: {}
   app-storage: {}
+  app-plts: {}
 
 services:
   app:
@@ -40,6 +41,7 @@ services:
       - "app-build:/workspace/_build:rw"
       - "app-elixir-ls:/workspace/.elixir_ls:rw"
       - "app-storage:/storage:rw"
+      - "app-plts:/workspace/priv/plts:rw"
     # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
     network_mode: service:db