Add in version history for http functions

and also load .env in dev mode

app.py

@@ -1,6 +1,6 @@
 import json
 import os
-from flask import Flask, Response, jsonify, redirect, render_template, request, url_for
+from flask import Flask, Response, jsonify, redirect, render_template, render_template_string, request, url_for
 import jinja_partials
 from jinja2_fragments import render_block
 from flask_htmx import HTMX
@@ -9,6 +9,12 @@ from db import DataBase
 from services import create_http_function_view_model, create_http_functions_view_model
 from flask_login import LoginManager, UserMixin, current_user, login_required, login_user, logout_user
 from werkzeug.security import check_password_hash, generate_password_hash
+import os
+from dotenv import load_dotenv
+
+# Load environment variables from .env file in non-production environments
+if os.environ.get('FLASK_ENV') != 'production':
+    load_dotenv()
 
 login_manager = LoginManager()
 app = Flask(__name__)
@@ -222,6 +228,38 @@ def client(function_id):
         return render_block(app.jinja_env, 'dashboard/http_functions/client.html', 'page', function_id=function_id, **http_function)
     return render_template("dashboard/http_functions/client.html", function_id=function_id, **http_function)
 
+@app.route("/dashboard/http_functions/<int:function_id>/history", methods=["GET"])
+@login_required
+def get_http_function_history(function_id):
+    user_id = current_user.id
+    http_function = db.get_http_function_by_id(user_id, function_id)
+    if not http_function:
+        return jsonify({'error': 'Function not found'}), 404
+    
+    name = http_function['name']
+    version_number = http_function['version_number']
+
+    http_function_history = []
+    if version_number > 1:
+        raw_history = db.get_http_function_history(function_id)
+
+        for i in range(len(raw_history) - 1):
+            pre_version = raw_history[i + 1]
+            post_version = raw_history[i]
+
+            http_function_history.append({
+                'pre': pre_version['script_content'],
+                'post': post_version['script_content'],
+                'version_id': post_version['version_id'],
+                'version_number': post_version['version_number'],
+                'updated_at': post_version['updated_at']
+            })
+
+
+    if htmx:
+        return render_block(app.jinja_env, 'dashboard/http_functions/history.html', 'page', user_id=user_id, function_id=function_id, name=name, http_function=http_function, http_function_history=http_function_history)
+    return render_template("dashboard/http_functions/history.html", user_id=user_id, name=name, function_id=function_id, http_function=http_function, http_function_history=http_function_history)
+
 @ app.route("/dashboard/timer_functions", methods=["GET"])
 @login_required
 def dashboard_timer_functions():