fix: remove base.Dockerfile as it's not needed

.devcontainer/base.Dockerfile

@@ -1,7 +0,0 @@
-ARG VARIANT=18
-FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:dev-${VARIANT}
-
-# Install tslint, typescript. eslint is installed by javascript image
-ARG NODE_MODULES="tslint-to-eslint-config typescript"
-RUN su node -c "umask 0002 && npm install -g ${NODE_MODULES}" \
-    && npm cache clean --force > /dev/null 2>&1

.devcontainer/devcontainer.json

@@ -7,9 +7,16 @@
       "VARIANT": "18"
     }
   },
+  "customizations": {
+    "env": {
+      "PATH": "/usr/local/share/.config/yarn/global/node_modules/.bin:$PATH"
+    },
+    "vscode": {
       "settings": {
         "terminal.integrated.shell.linux": "/bin/bash"
       },
-  "extensions": ["dbaeumer.vscode-eslint"],
+      "extensions": ["dbaeumer.vscode-eslint"]
+    }
+  },
   "remoteUser": "node"
 }