Added support for install postgresql

entrypoint.sh

@@ -10,6 +10,47 @@ mkdir -p "$(dirname "$INPUT_PATH")"
 
 echo "Created the output directory"
 
+if [[ -n "$INPUT_POSTGRESQL_VERSION" ]]; then
+    echo "Verifying version"
+
+    # Check if the input is an integer
+    if ! [[ "$INPUT_POSTGRESQL_VERSION" =~ ^[0-9]+$ ]]; then
+        echo "Error: $INPUT_POSTGRESQL_VERSION is not a valid integer."
+        exit 1
+    fi
+
+    # Check if the input is between 10 and 15 (inclusive)
+    if (( $INPUT_POSTGRESQL_VERSION < 10 || $INPUT_POSTGRESQL_VERSION > 15 )); then
+        echo "Error: $INPUT_POSTGRESQL_VERSION is not between 10 and 15 (inclusive)."
+        exit 1
+    fi
+
+    echo "Validated postgresql version: $INPUT_POSTGRESQL_VERSION"
+
+    echo "Installing postgresql..."
+
+    if [[ "$(uname -s)" == "Linux" ]]; then
+        sudo apt-get update
+        sudo apt-get install -y "postgresql-$INPUT_POSTGRESQL_VERSION"
+    elif [[ "$(uname -s)" == "NT"* ]]; then
+        choco install postgresql --version="$INPUT_POSTGRESQL_VERSION" -y
+    elif [[ "$(uname -s)" == "Darwin" ]]; then
+        brew update
+        brew install "postgresql@$INPUT_POSTGRESQL_VERSION"
+    else
+        echo "Unsupported OS"
+        exit 1
+    fi
+
+    if [[ "$(uname -s)" == "NT"* ]]; then
+        echo "/Program Files/PostgreSQL/15/bin" >> $GITHUB_PATH
+    else
+        echo "/usr/lib/postgresql/15/bin" >> $GITHUB_PATH
+    fi
+
+    echo "Installed postgresql"
+fi
+
 echo "Running pg_dump..."
 
 # shellcheck disable=SC2086