fix comments

Author: bzp2010

.devcontainer/Dockerfile

@@ -33,7 +33,6 @@ RUN curl -L https://github.com/etcd-io/etcd/releases/download/${ETCD_VER}/etcd-$
     && mkdir -p /tmp/etcd-download-test \
     && tar xzvf /tmp/etcd-${ETCD_VER}-linux-${BUILDARCH}.tar.gz -C /tmp/etcd-download-test --strip-components=1 \
     && mv /tmp/etcd-download-test/etcdctl /usr/bin \
-    && rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz && rm -rf /tmp/etcd-download-test \
     && rm -rf /tmp/*
 
 ENTRYPOINT [ "tini", "--" ]

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
   "service": "apisix",
   "workspaceFolder": "/workspace",
   "privileged": true,
-  "postCreateCommand": "bash -c 'cd /workspace && rm -rf test-nginx && git config --global --add safe.directory /workspace && git submodule update --init --recursive && git clone https://github.com/openresty/test-nginx.git --depth 1 && make deps'",
+  "postCreateCommand": "bash -c 'cd /workspace && rm -rf test-nginx && git config --global --add safe.directory /workspace && git submodule update --init --recursive && git clone https://github.com/openresty/test-nginx.git --depth 1 --single-branch -b master && make deps'",
   "customizations": {
     "vscode": {
       "extensions": ["ms-vscode.makefile-tools", "ms-azuretools.vscode-docker", "sumneko.lua"]