add basic upload/download

.env.example

@@ -1 +1,20 @@
+# The number of workers the server will use. Flask recommends (cpu count * 2) as a baseline.
 WORKERS=4
+# The secret key used for tokens. You can generate one with (for example) `openssl rand -base64 48`.
+SECRET_KEY=change-me-insecure!-Fj+4Y8afr3TzLpG1bkSYQxEVrhGPr5nokxBs9JPxfuvv
+# The database file used
+DATABASE=data/db.sqlite
+
+# The base URL used for uploaded files.
+# This should include the schema (http:// or https://) and not have a trailing slash.
+BASE_URL=http://localhost:5000
+
+# The storage backend used, can be 'local' or 's3'
+STORAGE_BACKEND=local
+# The directory files are uploaded to with the local setting, relative to the working directory.
+STORAGE_LOCAL_DIR=data/uploads
+
+# The maximum uploaded file size, in megabytes. Setting this to 0 or a negative number allows unlimited file sizes.
+MAX_FILE_SIZE=15
+# The maximum content length Flask will accept. This should generally be slightly higher than MAX_FILE_SIZE.
+MAX_CONTENT_LENGTH=16