[AB-70] moving image generation functionality to separate image generation module

removing doge image generation from default base
split rest-api into separate modules (base and extensions)

python/components/image-gen/docker/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine:3.19.0
+ADD resources /python/resources
+ADD python /python

python/components/image-gen/python/endpoints/triggered.py

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+from __main__ import app
+
+from PIL import Image, ImageOps
+from flask import request
+import requests
+import validators
+import logging
+import io
+
+from utils import flask_utils
+
+
+allowed_content_length = 4_000_000
+allowed_image_formats = ['image/png', 'image/jpeg', 'image/jpg', 'image/gif']
+max_off_set = 5
+gif_speedup_factor = 4
+
+
+@app.route('/memes/triggered/file.gif')  # to directly embed, discord _requires_ this file ending, it seems
+def triggered_animated():
+    url = request.args.get('url')
+    if not validators.url(url):
+        return 'no valid url', 400
+    session = requests.Session()
+    response = session.head(url)
+    content_type = response.headers['content-type']
+
+    if content_type not in allowed_image_formats:
+        return f'Incorrect image type {content_type}', 400
+
+    actual_content_length = int(response.headers['content-length'])
+    if actual_content_length > allowed_content_length:
+        return f'Image too large {actual_content_length}', 400
+
+    image_file = requests.get(url, stream=True)
+    input_image = Image.open(io.BytesIO(image_file.content))
+    original_input_image = input_image
+    old_width, old_height = input_image.size
+    with Image.open('resources/img/triggered_footer.jpg') as footer_image:
+        footer_width, footer_height = footer_image.size
+        footer_ratio = old_width / footer_width
+        desired_new_footer_width = int(footer_width * footer_ratio)
+        if footer_ratio > 1:
+            footer_image = footer_image.resize((desired_new_footer_width, footer_height))
+        else:
+            footer_image = ImageOps.contain(footer_image, (desired_new_footer_width, footer_height))
+        new_footer_width, new_footer_height = footer_image.size
+        new_total_height = old_height + new_footer_height
+        points = [[0, -max_off_set], [max_off_set, 0], [0, max_off_set], [-max_off_set, 0]]
+        if content_type == 'image/gif':
+            logging.info(f'Rendering triggered for gif.')
+            frame_count = original_input_image.n_frames
+            old_frames = []
+            for frame_index in range(frame_count):
+                input_image.seek(frame_index)
+                frame = input_image.convert('RGBA')
+                old_frames.append(frame)
+            frames = []
+            for index, old_frame in enumerate(old_frames):
+                off_set = points[index % len(points)]
+                frame = Image.new('RGBA', (old_width, new_total_height), (0, 0, 0, 0))
+                old_frame = ImageOps.contain(old_frame, (old_width + max_off_set * 2, old_height + max_off_set * 2))
+                frame.paste(old_frame, (-max_off_set + off_set[0], -max_off_set + off_set[1]))
+                frame.paste(footer_image, (0, old_height))
+                frames.append(frame)
+            return flask_utils.serve_pil_gif_image(frames, (int(original_input_image.info['duration']) / gif_speedup_factor))
+        else:
+            input_image = ImageOps.contain(input_image, (old_width + max_off_set * 2, old_height + max_off_set * 2))
+            frames = []
+            logging.info(f'Rendering triggered for static image.')
+            for off_set in points:
+                frame = Image.new('RGBA', (old_width, new_total_height), (0, 0, 0, 0))
+                frame.paste(input_image, (-max_off_set + off_set[0], -max_off_set + off_set[1]))
+                frame.paste(footer_image, (0, old_height))
+                frames.append(frame)
+            return flask_utils.serve_pil_gif_image(frames)