Add default arguments so docker-compose up creates a running containe…

…r locally (#5023)

Dockerfile

@@ -53,9 +53,9 @@ RUN yarn workspace @corona-dashboard/common build \
 && yarn test:ci
 
 # Map arguments to environment variables
-ARG ARG_NEXT_PUBLIC_SANITY_DATASET
-ARG ARG_NEXT_PUBLIC_SANITY_PROJECT_ID
-ARG ARG_NEXT_PUBLIC_COMMIT_ID
+ARG ARG_NEXT_PUBLIC_SANITY_DATASET="production"
+ARG ARG_NEXT_PUBLIC_SANITY_PROJECT_ID="5mog5ask"
+ARG ARG_NEXT_PUBLIC_COMMIT_ID="n/a"
 ARG ARG_NEXT_PUBLIC_PHASE="production"
 ARG ARG_NEXT_PUBLIC_HOT_RELOAD_LOKALIZE=0
 ARG ARG_ACTIVE_DATA_URL