cache bundle install at devcontainer build step

.devcontainer/Dockerfile

@@ -19,5 +19,15 @@ RUN git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ru
 RUN rbenv install 3.4.4 && \
     rbenv global 3.4.4
 
+# cache bundle install to make reloading the devcontainer faster
+RUN mkdir -p /tmp/bundle-install-cache && \
+    chown -R vscode:vscode /tmp/bundle-install-cache
+WORKDIR /tmp/bundle-install-cache
+COPY lib/has_aux_table/version.rb /tmp/bundle-install-cache/lib/has_aux_table/version.rb
+COPY Gemfile.lock Gemfile has-aux-table.gemspec /tmp/bundle-install-cache/
+RUN BUNDLE_FROZEN=true MAKE="make -j$(nproc)" bundle install --jobs $(nproc)
+
 # convenience aliases
 RUN echo 'alias rspec="bundle exec rspec"' >> ~/.bashrc
+RUN echo 'alias tapioca="bundle exec tapioca"' >> ~/.bashrc
+RUN echo 'alias srb="bundle exec srb"' >> ~/.bashrc

.devcontainer/devcontainer.json

@@ -4,7 +4,8 @@
 	"name": "Ruby",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
 	"build": {
-		"dockerfile": "Dockerfile"
+		"dockerfile": "Dockerfile",
+		"context": ".."
 	},
 	"features": {
 		"ghcr.io/devcontainers-extra/features/npm-package:1": {
@@ -18,10 +19,11 @@
 				"aliariff.vscode-erb-beautify",
 				"KoichiSasada.vscode-rdbg",
 				"qwtel.sqlite-viewer",
-				"ms-azuretools.vscode-docker"
+				"ms-azuretools.vscode-docker",
+				"ryanluker.vscode-coverage-gutters"
 			]
 		}
-	},
+	}
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.