Update Dockerfile

Dockerfile

@@ -6,12 +6,11 @@ COPY requirements.txt .
 
 RUN pip install --no-cache-dir -r requirements.txt
 
-ENV CALDAV_URL $CALDAV_URL 
-ENV CALENDAR_NAME $CALENDAR_NAME 
-ENV USERNAME $USERNAME
-ENV PASSWORD $PASSWORD
-ENV RA_API $RA_API
-ENV RA_USER $RA_USER
+ENV CALDAV_URL=$CALDAV_URL 
+ENV CALENDAR_NAME=$CALENDAR_NAME 
+ENV USERNAME=$USERNAME
+ENV PASSWORD=$PASSWORD
+ENV RA_API=$RA_API
+ENV RA_USER=$RA_USER
 
-ENTRYPOINT ["sh", "-c"]
-CMD python3 ./app.py "$CALDAV_URL" "$CALENDAR_NAME" "$USERNAME" "$PASSWORD" "$RA_API" "$RA_USER"
+CMD ["sh", "-c", "python3 ./app.py \"${CALDAV_URL}\" \"${CALENDAR_NAME}\" \"${USERNAME}\" \"${PASSWORD}\" \"${RA_API}\" \"${RA_USER}\""]