added docker installation script and docker compose for ntfy local

docker-compose.yaml

@@ -0,0 +1,27 @@
+services:
+  ntfy:
+    image: binwiederhier/ntfy
+    container_name: ntfy-local
+    restart: unless-stopped
+    command:
+      - serve
+    environment:
+      - TZ=IST
+    user: 1000:1000
+    volumes:
+      - /var/cache/ntfy:/var/cache/ntfy
+      - /etc/ntfy:/etc/ntfy
+    ports:
+      - 80:80
+    healthcheck:
+        test: ["CMD-SHELL", "wget -q --tries=1 http://localhost:80/v1/health -O - | grep -Eo '\"healthy\"\\s*:\\s*true' || exit 1"]
+        interval: 60s
+        timeout: 10s
+        retries: 3
+        start_period: 40s
+    networks:
+      - ntfy
+
+networks:
+  ntfy:
+    driver: bridge

docker-setup.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+###############################################
+line="=================================="
+
+# Remove conflicting packages
+for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done
+
+# Setup Docker's apt repo
+# Add Docker's official GPG key:
+sudo apt-get update
+sudo apt-get install -y ca-certificates curl
+sudo install -m 0755 -d /etc/apt/keyrings
+sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
+sudo chmod a+r /etc/apt/keyrings/docker.asc
+
+# Add the repository to Apt sources:
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+sudo apt-get update
+
+# Install docker
+sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+sudo systemctl start docker.socket
+sudo systemctl enable docker.socket
+sudo systemctl start containerd.service
+sudo systemctl enable containerd.service
+
+# Test
+sudo docker run hello-world
+
+# Use docker without sudo
+sudo groupadd docker
+sudo usermod -aG docker $USER
+sudo chown $USER:docker /var/run/docker.sock
+
+# Show running containers
+docker ps -a
+
+echo -e "\n$line"
+echo -e "Docker setup complete."
+echo -e "## Designed and Engineered by Kshitij"
+echo -e "$line\n"