Adding QEMU static arm binary to build ARM images

README.md

@@ -75,7 +75,7 @@
     modprobe tun
     ```
 
-1. **IF YOU HAVE AN ARM DEVICE, depending on your cpu architecture:** replace `qmcgaw/private-internet-access`
+1. **ONLY IF YOU HAVE AN ARM DEVICE, depending on your cpu architecture,** replace `qmcgaw/private-internet-access`
    with either `qmcgaw/private-internet-access:armhf` (32 bit) or `qmcgaw/private-internet-access:aarch64` (64 bit).
 
 1. Launch the container with:
@@ -246,6 +246,27 @@ services:
     # add more volumes etc.
 ```
 
+## ARM devices
+
+If you want to save 3-5MB on the image (because of QEMU), use the following command on
+your ARM device:
+
+- If your architecture is ARMHF (32 bit)
+
+    ```sh
+    docker build -t qmcgaw/private-internet-access:armhf \
+    --build-arg BASE_IMAGE=arm32v6/alpine \
+    https://github.com/qdm12/private-internet-access-docker.git
+    ```
+
+- If your architecture is AARCH64 (64 bit)
+
+    ```sh
+    docker build -t qmcgaw/private-internet-access:aarch64 \
+    --build-arg BASE_IMAGE=arm64v8/alpine \
+    https://github.com/qdm12/private-internet-access-docker.git
+    ```
+
 ## For the paranoids
 
 - You can review the code which essential consits in the [Dockerfile](https://github.com/qdm12/private-internet-access-docker/blob/master/Dockerfile) and [entrypoint.sh](https://github.com/qdm12/private-internet-access-docker/blob/master/entrypoint.sh)