fix

.devcontainer/devcontainer.json

@@ -22,8 +22,13 @@
   // "forwardPorts": [],
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  "postCreateCommand": "npm ci",
+  // "postCreateCommand": "npm ci",
 
   // Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
-  // "remoteUser": "vscode"
+  // "remoteUser": "vscode",
+
+  // Developing inside a container on a remote Docker host
+  // https://code.visualstudio.com/docs/remote/containers-advanced#_developing-inside-a-container-on-a-remote-docker-host
+  "workspaceFolder": "/workspace",
+  "workspaceMount": "source=/home/iris/Documents/repos/github.com/peaceiris/actions-hugo,target=/workspace,type=volume"
 }

Dockerfile

@@ -23,7 +23,7 @@ RUN wget -q "https://github.com/git/git/archive/v${GIT_VERSION}.tar.gz" && \
     make all && \
     make install
 
-WORKDIR /repo
+WORKDIR /workspace
 ENV RUNNER_TEMP="/tmp"
 
 CMD [ "bash" ]