Add boto3 to requirements

backend/requirements.txt

 anyio==3.6.2
+boto3==1.26.106
+botocore==1.29.106
 click==8.1.3
+distlib==0.3.6
 fastapi==0.95.0
+filelock==3.10.7
 h11==0.14.0
 httptools==0.5.0
 idna==3.4
+jmespath==1.0.1
+platformdirs==3.2.0
 pydantic==1.10.7
+python-dateutil==2.8.2
 python-dotenv==1.0.0
 PyYAML==6.0
+s3transfer==0.6.0
+six==1.16.0
 sniffio==1.3.0
 starlette==0.26.1
 typing_extensions==4.5.0
+urllib3==1.26.15
 uvicorn==0.21.1
 uvloop==0.17.0
+virtualenv==20.21.0
 watchfiles==0.19.0
 websockets==11.0