fix: cannot run sudo command in Devcontainer (#1879)

The filenames in the sudoers.d directory cannot contain '~' and '.'. In previous Devcontainer, if a username contains a ., it cannot be granted root permissions as the filename generated is not effective.
Ref: https://superuser.com/questions/869144/why-does-the-system-have-etc-sudoers-d-how-should-i-edit-it

.devcontainer/Dockerfile

@@ -40,11 +40,13 @@ RUN source /tmp/.env && rm /tmp/.env; \
     fi; \
     useradd --uid $USER_UID --gid $GROUP_GID -m $USERNAME; \
     if [ -n "$USER_PASSWORD" ]; then echo "$USERNAME:$USER_PASSWORD" | chpasswd; fi; \
-    echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME; \
-    chmod 0440 /etc/sudoers.d/$USERNAME; \
+    # the filename should not have the . or ~ symbol.
+    USER_SUDOER_FILE=$(echo $USERNAME | sed 's/\./-/g'); \
+    echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USER_SUDOER_FILE; \
+    chmod 0440 /etc/sudoers.d/$USER_SUDOER_FILE; \
     chown -R $USERNAME:$GROUPNAME /opt $(eval echo ~$USERNAME); \
     chmod -R 755 $(eval echo ~$USERNAME);
 
 USER $USERNAME
 
-RUN go env -w GO111MODULE=on && go env -w GOPROXY=https://goproxy.cn,direct
+RUN go env -w GO111MODULE=on && go env -w GOPROXY=https://goproxy.cn,direct