diff --git a/Dockerfile b/Dockerfile
index ee9c3d0..5801186 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,2 @@
-FROM postgres:9.6
+FROM postgres:latest
 COPY create-multiple-postgresql-databases.sh /docker-entrypoint-initdb.d/
diff --git a/README.md b/README.md
index d4b6a15..7486925 100644
--- a/README.md
+++ b/README.md
@@ -20,34 +20,16 @@ mechanism.
 Clone the repository, mount its directory as a volume into
 `/docker-entrypoint-initdb.d` and declare database names separated by commas in
 `POSTGRES_MULTIPLE_DATABASES` environment variable as follows
-(`docker-compose` syntax):
+(`github actions` syntax):
 
-    myapp-postgresql:
-        image: postgres:9.6.2
+    postgres:
+        image: postgres:12
         volumes:
-            - ../docker-postgresql-multiple-databases:/docker-entrypoint-initdb.d
-        environment:
-            - POSTGRES_MULTIPLE_DATABASES: db1,db2
-            - POSTGRES_USER: myapp
-            - POSTGRES_PASSWORD:
-
-### By building a custom image
-
-Clone the repository, build and push the image to your Docker repository,
-for example for Google Private Repository do the following:
-
-    docker build --tag=eu.gcr.io/your-project/postgres-multi-db .
-    gcloud docker -- push eu.gcr.io/your-project/postgres-multi-db
-
-You still need to pass the `POSTGRES_MULTIPLE_DATABASES` environment variable
-to the container:
-
-    myapp-postgresql:
-        image: eu.gcr.io/your-project/postgres-multi-db
-        environment:
-            - POSTGRES_MULTIPLE_DATABASES: db1,db2
-            - POSTGRES_USER: myapp
-            - POSTGRES_PASSWORD:
+            - docker-postgresql-multiple-databases:/docker-entrypoint-initdb.d
+        env:
+            POSTGRES_MULTIPLE_DATABASES: db1,db2
+            POSTGRES_USER: postgres
+            POSTGRES_PASSWORD: postgres
 
 ### Non-standard database names
 
diff --git a/create-multiple-postgresql-databases.sh b/create-multiple-postgresql-databases.sh
index aa665fa..7aa5abc 100755
--- a/create-multiple-postgresql-databases.sh
+++ b/create-multiple-postgresql-databases.sh
@@ -5,11 +5,10 @@ set -u
 
 function create_user_and_database() {
 	local database=$1
-	echo "  Creating user and database '$database'"
+	echo "  Creating database '$database'"
 	psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" <<-EOSQL
-	    CREATE USER $database;
 	    CREATE DATABASE $database;
-	    GRANT ALL PRIVILEGES ON DATABASE $database TO $database;
+	    GRANT ALL PRIVILEGES ON DATABASE $database TO $POSTGRES_USER;
 EOSQL
 }