diff --git a/gdal_rio.env b/.env.example
similarity index 100%
rename from gdal_rio.env
rename to .env.example
diff --git a/Dockerfile b/Dockerfile
index d654092..689a19b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,8 +11,10 @@ RUN pipenv run pip install -U pip
 COPY requirements.txt requirements.txt
 RUN pipenv run pip install -r requirements.txt
 COPY src/cogserver cogserver
-ENV HOST=0.0.0.0
-ENV PORT=8000
-ENV LOG_LEVEL=info
-ENV RELOAD=--reload
+
+ARG HOST=0.0.0.0
+ARG PORT=8000
+ARG LOG_LEVEL=info
+ARG RELOAD=--reload
+
 CMD pipenv run uvicorn cogserver:app --host ${HOST} --port ${PORT} --log-level ${LOG_LEVEL} ${RELOAD}
diff --git a/README.md b/README.md
index af5e2aa..d7aa125 100644
--- a/README.md
+++ b/README.md
@@ -42,11 +42,11 @@ a) pushing tags
        ```
 # local development
 
-The server's config variables are defined in [gdal_rio.env](/gdal_rio.env). By passing this file at runtime to 
+The server's config variables are defined in [.env](.env). To create `.env` file, please copy `env.example` file by using the command of `cp .env.example .env`. By passing this file at runtime to 
 docker-compose the server can be started using:
 
 ```commandline
- docker-compose --env-file gdal_rio.env up --build
+ docker-compose --env-file .env up --build
 ```
 
 [gdal_rio.env](/gdal_rio.env) contains several important environmental variables.
diff --git a/docker-compose.yml b/docker-compose.yml
index 1c94672..24004bb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,24 +3,15 @@ version: '3'
 services:
   cogserver:
     # See https://github.com/developmentseed/titiler/discussions/387
-    #platform: linux/amd64
+    platform: linux/amd64
     # enable `image` if you would like to use Docker image from Github package
     #image: ghcr.io/undp-data/cogserver:latest
-    # enable `build` if you would like to build Docker image from source code
-#    image: undpgeohub.azurecr.io/cogserver-debug
     build:
       context: .
-    container_name: cogserver
     # Enable the following volumes if you want to mount source code to Docker
     volumes:
        - "./src/cogserver:/opt/server/cogserver"
     env_file:
-      - ./gdal_rio.env
-    environment:
-      - RELOAD=--reload
-    # the above env file contains the $PORT variable.
+      - .env
     ports:
       - "${PORT}:${PORT}"
-
-
-