Add devcontainer integration

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Author: crawfxrd

.devcontainer/devcontainer.json

@@ -0,0 +1,15 @@
+{
+  "name": "System76 EC",
+  "build": {
+    "dockerfile": "../tools/containers/ec/Containerfile"
+  },
+  "customizations": {
+    "vscode": {
+      "settings": {},
+      "extensions": [
+        "EditorConfig.EditorConfig",
+        "rust-lang.rust-analyzer"
+      ]
+    }
+  }
+}

.editorconfig

@@ -16,5 +16,5 @@ trim_trailing_whitespace = false
 [{Makefile,*.mk}]
 indent_style = tab
 
-[*.yml]
+[*.{json,yaml,yml}]
 indent_size = 2

tools/containers/ec/Containerfile

@@ -104,7 +104,6 @@ RUN apt-get --quiet update \
 # a comma separated list as an argument with a space.
 # Ref: https://github.com/rust-lang/rustup/issues/4073
 RUN rustup toolchain install \
-        --no-self-update \
         --target x86_64-unknown-linux-gnu,x86_64-unknown-uefi \
         --profile minimal \
         --component=clippy,rustfmt \