Add ARMv6 install instructions

docs/install.md

@@ -33,6 +33,15 @@ deb/rpm packages.
     sudo ntfy serve
     ```
 
+=== "armv6"
+    ```bash
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv6.tar.gz
+    tar zxvf ntfy_1.21.0_linux_armv6.tar.gz
+    sudo cp -a ntfy_1.21.0_linux_armv6/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_1.21.0_linux_armv6/{client,server}/*.yml /etc/ntfy
+    sudo ntfy serve
+    ```
+
 === "armv7/armhf"
     ```bash
     wget https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv7.tar.gz
@@ -66,6 +75,18 @@ Installation via Debian repository:
     sudo systemctl start ntfy
     ```
 
+=== "armv6"
+    ```bash
+    curl -sSL https://archive.heckel.io/apt/pubkey.txt | sudo apt-key add -
+    sudo apt install apt-transport-https
+    sudo sh -c "echo 'deb https://archive.heckel.io/apt debian main' \
+        > /etc/apt/sources.list.d/archive.heckel.io.list"  
+    sudo apt update
+    sudo apt install ntfy
+    sudo systemctl enable ntfy
+    sudo systemctl start ntfy
+    ```
+
 === "armv7/armhf"
     ```bash
     curl -sSL https://archive.heckel.io/apt/pubkey.txt | sudo apt-key add -
@@ -100,6 +121,14 @@ Manually installing the .deb file:
     sudo systemctl start ntfy
     ```
 
+=== "armv6"
+    ```bash
+    wget https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv6.deb
+    sudo dpkg -i ntfy_*.deb
+    sudo systemctl enable ntfy
+    sudo systemctl start ntfy
+    ```
+
 === "armv7/armhf"
     ```bash
     wget https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv7.deb
@@ -125,6 +154,13 @@ Manually installing the .deb file:
     sudo systemctl start ntfy
     ```
 
+=== "armv6"
+    ```bash
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv6.rpm
+    sudo systemctl enable ntfy
+    sudo systemctl start ntfy
+    ```
+
 === "armv7/armhf"
     ```bash
     sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v1.21.0/ntfy_1.21.0_linux_armv7.rpm