FEATURE (installation): Update installation script with creds and wait until DB initialized

Author: RostislavDugin

README.md

@@ -2,18 +2,20 @@ You have 2 ways how to run Postgresus:
 
 # Installation
 
-1) Install Postgresus via script.
+**1) Install Postgresus via script.**
+
 It will:
 - install Docker with Docker Compose
 - write docker-compose.yml config
 - install cron job to start Postgresus on system reboot
 
+To install, run:
+```
+apt-get install -y curl && \
+curl -sSL https://raw.githubusercontent.com/RostislavDugin/postgresus/refs/heads/main/install-postgresus.sh | bash
+```
 
-> apt-get install -y curl
-> curl -sSL https://raw.githubusercontent.com/rostislavdugin/postgresus/main/install-postgresus.sh | bash
-> docker-compose up
-
-2) Write docker-compose.yml config manually:
+**2) Write docker-compose.yml config manually:**
 
 ```
 version: "3"
@@ -30,8 +32,8 @@ services:
     # PostgreSQL ports so it is safe
     environment:
       - POSTGRES_DB=postgresus
-      - POSTGRES_USER=postgresus
-      - POSTGRES_PASSWORD=postgresus
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=Q1234567
     volumes:
       - ./pgdata:/var/lib/postgresql/data
     container_name: postgresus-db

docker-compose.yml.example

@@ -14,7 +14,9 @@ services:
     ports:
       - "4005:4005"
     depends_on:
-      - postgresus-db
+      postgresus-db:
+        condition: service_healthy
+    restart: unless-stopped
 
   postgresus-db:
     image: postgres:17
@@ -29,3 +31,9 @@ services:
     container_name: postgresus-db
     command: -p 5437
     shm_size: 10gb
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgresus -d postgresus -p 5437"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped

install-postgresus.sh

@@ -59,6 +59,10 @@ services:
     image: rostislavdugin/postgresus:latest
     ports:
       - "4005:4005"
+    depends_on:
+      postgresus-db:
+        condition: service_healthy
+    restart: unless-stopped
 
   postgresus-db:
     image: postgres:17
@@ -73,6 +77,12 @@ services:
     container_name: postgresus-db
     command: -p 5437
     shm_size: 10gb
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgresus -d postgresus -p 5437"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped
 EOF
 log "docker-compose.yml created successfully"