fix Dockerfile placeholder env variables

Dockerfile

@@ -17,6 +17,15 @@ RUN DATABASE_URL=postgres://x/x \
     SECRET_KEY=x \
     ALLOWED_HOSTS=x \
     SITE_URL=x \
+    OIDC_RP_REALM_URL=x \
+    OIDC_RP_CLIENT_ID=x \
+    OIDC_RP_CLIENT_SECRET=x \
+    DEFAULT_COUNTRY=x \
+    DEFAULT_CONTRACTEE_NAME=x \
+    DEFAULT_CONTRACTEE_STREET=x \
+    DEFAULT_CONTRACTEE_ZIP=x \
+    DEFAULT_CONTRACTEE_DISTRICT=x \
+    DEFAULT_CONTRACTEE_ICO_NUMBER=x \
     python manage.py collectstatic --noinput --settings=registry.settings.production
 
 RUN bash -c "adduser --disabled-login --quiet --gecos app app &&  \