Fixed file upload and OCR functionality

app.py

@@ -42,4 +42,6 @@ def uploaded_file(filename):
     return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=5000)
+    port = int(os.environ.get('PORT', 5000))  # <-- IMPORTANT
+    app.run(host='0.0.0.0', port=port)
+

require.txt

@@ -1,10 +0,0 @@
-shapely==2.1.0
-scikit-image==0.18.3
-imgaug==0.4.0
-pyclipper
-lmdb
-tqdm
-numpy
-visualdl
-python-Levenshtein
-opencv-contrib-python==4.5.5.62

requirements.txt

@@ -1,3 +1,13 @@
 flask
 paddleocr
 paddlepaddle
+shapely==2.1.0
+scikit-image==0.18.3
+imgaug==0.4.0
+pyclipper
+lmdb
+tqdm
+numpy
+visualdl
+python-Levenshtein
+opencv-contrib-python==4.5.5.62