docker: configure config.toml using environment variable

Signed-off-by: Navratan Lal Gupta <navilg0409@gmail.com>

container_entrypoint.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+CONFIG_TOML_FILE=/home/perplexica/config.toml
+
+TMP_FILE=${CONFIG_TOML_FILE}.tmp
+touch $TMP_FILE
+
+while IFS= read -r line; do
+    # Check if line is a section header (e.g., "[GENERAL]")
+    if [[ "$line" =~ ^\[([^]]+)\] ]]; then
+        current_section="${BASH_REMATCH[1]}"
+        echo "$line" >> "$TMP_FILE"
+        continue
+    fi
+
+    # Skip empty lines and comments
+    if [[ -z "$line" || "$line" =~ ^[[:space:]]*\# ]]; then
+        echo "$line" >> "$TMP_FILE"
+        continue
+    fi
+
+    # Extract key and value (handling quoted values)
+    key=$(echo "$line" | cut -d '=' -f 1 | xargs)
+    value=$(echo "$line" | cut -d '=' -f 2- | xargs)
+
+
+    # Construct the environment variable name in form of SECTION_KEY (e.g., GENERAL_SIMILARITY_MEASURE, MODELS_GEMINI_API_KEY)
+    current_section=$(echo "$current_section" | sed 's/\./_/')
+    env_var_name="${current_section}_${key}"
+
+    # Check if the environment variable exists
+    env_var_value=$(echo "${!env_var_name}")
+    if [ -n "$env_var_value" ]; then
+        new_value="$env_var_value"
+        echo "$key = $new_value" >> "$TMP_FILE"
+    else
+        # Keep original line if no env var exists
+        echo "$line" >> "$TMP_FILE"
+    fi
+
+done < "$CONFIG_TOML_FILE"
+
+# Replace the original file
+mv "$TMP_FILE" "$CONFIG_TOML_FILE"
+
+echo "Config file updated successfully."
+
+# Start server
+node server.js