diff --git a/Dockerfile b/Dockerfile
index 133823e1..6ac8298c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,18 +29,21 @@ RUN cd /doccano \
 
 FROM python:${PYTHON_VERSION}-slim AS runtime
 
+RUN useradd -ms /bin/sh doccano
+
 COPY --from=builder /deps /deps
 RUN pip install --no-cache-dir /deps/*.whl
 
-COPY --from=cleaner /doccano /doccano
+COPY --from=cleaner --chown=doccano:doccano /doccano /doccano
 
 ENV DEBUG="True"
 ENV SECRET_KEY="change-me-in-production"
-ENV PORT="80"
+ENV PORT="8000"
 ENV WORKERS="2"
 ENV GOOGLE_TRACKING_ID=""
 ENV AZURE_APPINSIGHTS_IKEY=""
 
+USER doccano
 WORKDIR /doccano
 EXPOSE ${PORT}
 
diff --git a/README.md b/README.md
index 181a703c..73e6e2b0 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ Depending on your installation method, there are two options:
 First, run a Docker container:
 
 ```bash
-docker run -d --name doccano -p 8000:80 chakkiworks/doccano
+docker run -d --name doccano -p 8000:8000 chakkiworks/doccano
 ```
 
 Then, execute `create-admin.sh` script for creating a superuser.
diff --git a/azuredeploy.json b/azuredeploy.json
index 487ed3c3..8623e476 100644
--- a/azuredeploy.json
+++ b/azuredeploy.json
@@ -271,6 +271,14 @@
           "linuxFxVersion": "[concat('DOCKER|', parameters('dockerImageName'))]",
           "alwaysOn": true,
           "appSettings": [
+            {
+              "name": "WEBSITES_PORT",
+              "value": "8000"
+            },
+            {
+              "name": "PORT",
+              "value": "8000"
+            },
             {
               "name": "WEBSITES_ENABLE_APP_SERVICE_STORAGE",
               "value": "false"