chore: remove gunicorn and gevent from minimum requirements

It is now up to the user to install these (or other) for production deployment.
More info: https://flask.palletsprojects.com/en/1.1.x/tutorial/deploy/#run-with-a-production-server

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "23cccdbeebec7b62d7e7d1c9975bc21d4ad6683d9c24c37c10120a3ed7a44d96"
+            "sha256": "d21f745fb8f799aaca868b4c97000f31e455063a8241366b1e0b0cd381489a0e"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -139,65 +139,6 @@
             "index": "pypi",
             "version": "==0.7.0"
         },
-        "gevent": {
-            "hashes": [
-                "sha256:00b03601b8dd1ee2aa07811cb60a4befe36173b15d91c6e207e37f8d77dd6fac",
-                "sha256:0acc15ba2ac2a555529ad82d5a28fc85dbb6b2ff947657d67bebfd352e2b5c14",
-                "sha256:15eae3cd450dac7dae7f4ac59e01db1378965c9ef565c39c5ae78c5a888f9ac9",
-                "sha256:1dc7f1f6bc1f67d625e4272b01e717eba0b4fa024d2ff7934c8d320674d6f7fa",
-                "sha256:1dd95433be45e1115053878366e3f5332ae99c39cb345be23851327c062b9f4a",
-                "sha256:28b7d83b4327ceb79668eca2049bf4b9ce66d5ace18a88335e3035b573f889fd",
-                "sha256:31dc5d4ab8172cc00c4ff17cb18edee633babd961f64bf54214244d769bc3a74",
-                "sha256:38db524ea88d81d596b2cbb6948fced26654a15fec40ea4529224e239a6f45e8",
-                "sha256:3ff477b6d275396123faf8ce2d5b82f96d85ba264e0b9d4b56a2bac49d1b9adc",
-                "sha256:4d2729dd4bf9c4d0f29482f53cdf9fc90a498aebb5cd7ae8b45d35657437d2ac",
-                "sha256:52e5cd607749ed3b8aa0272cacf2c11deec61fca4c3bec57a9fea8c49316627d",
-                "sha256:5c604179cebcc57f10505d8db177b92a715907815a464b066e7eba322d1c33ac",
-                "sha256:88c76df4967c5229f853aa67ad1b394d9e4f985b0359c9bc9879416bba3e7c68",
-                "sha256:929c33df8e9bcbe31906024fcd21580bd018196dbd3249eb5b2f19d63e11092d",
-                "sha256:92edc18a357473e01a4e4a82c073ed3c99ceca6e3ce93c23668dd4a2401f07dc",
-                "sha256:937d36730f2b0dee3387712074b1f15b802e2e074a3d7c6dcaf70521236d607c",
-                "sha256:9b4e940fc6071afebb86ba5f48dbb5f1fc3cb96ebeb8cf145eb5b499e9c6ee33",
-                "sha256:a7805934e8ce81610b61f806572c3d504cedd698cc8c9460d78d2893ba598c4a",
-                "sha256:d07a2afe4215731eb57d5b257a2e7e7e170d8a7ae1f02f6d0682cd3403debea9",
-                "sha256:e01d5373528e4ebdde66dc47a608d225fa3c4408ccd828d26c49b7ff75d82bd9",
-                "sha256:efd9546468502a30ddd4699c3124ccb9d3099130f9b5ae1e2a54ad5b46e86120",
-                "sha256:fcb64f3a28420d1b872b7ef41b12e8a1a4dcadfc8eff3c09993ab0cdf52584a1"
-            ],
-            "index": "pypi",
-            "version": "==20.5.0"
-        },
-        "greenlet": {
-            "hashes": [
-                "sha256:1000038ba0ea9032948e2156a9c15f5686f36945e8f9906e6b8db49f358e7b52",
-                "sha256:133ba06bad4e5f2f8bf6a0ac434e0fd686df749a86b3478903b92ec3a9c0c90b",
-                "sha256:1429dc183b36ec972055e13250d96e174491559433eb3061691b446899b87384",
-                "sha256:1b805231bfb7b2900a16638c3c8b45c694334c811f84463e52451e00c9412691",
-                "sha256:3a35e33902b2e6079949feed7a2dafa5ac6f019da97bd255842bb22de3c11bf5",
-                "sha256:5ea034d040e6ab1d2ae04ab05a3f37dbd719c4dee3804b13903d4cc794b1336e",
-                "sha256:682328aa576ec393c1872615bcb877cf32d800d4a2f150e1a5dc7e56644010b1",
-                "sha256:6e06eac722676797e8fce4adb8ad3dc57a1bb3adfb0dd3fdf8306c055a38456c",
-                "sha256:7eed31f4efc8356e200568ba05ad645525f1fbd8674f1e5be61a493e715e3873",
-                "sha256:80cb0380838bf4e48da6adedb0c7cd060c187bb4a75f67a5aa9ec33689b84872",
-                "sha256:b0b2a984bbfc543d144d88caad6cc7ff4a71be77102014bd617bd88cfb038727",
-                "sha256:c196a5394c56352e21cb7224739c6dd0075b69dd56f758505951d1d8d68cf8a9",
-                "sha256:d83c1d38658b0f81c282b41238092ed89d8f93c6e342224ab73fb39e16848721",
-                "sha256:df7de669cbf21de4b04a3ffc9920bc8426cab4c61365fa84d79bf97401a8bef7",
-                "sha256:e5db19d4a7d41bbeb3dd89b49fc1bc7e6e515b51bbf32589c618655a0ebe0bf0",
-                "sha256:e695ac8c3efe124d998230b219eb51afb6ef10524a50b3c45109c4b77a8a3a92",
-                "sha256:eac2a3f659d5f41d6bbfb6a97733bc7800ea5e906dc873732e00cebb98cec9e4"
-            ],
-            "markers": "platform_python_implementation == 'CPython'",
-            "version": "==0.4.16"
-        },
-        "gunicorn": {
-            "hashes": [
-                "sha256:1904bb2b8a43658807108d59c3f3d56c2b6121a701161de0ddf9ad140073c626",
-                "sha256:cd4a810dd51bf497552cf3f863b575dabd73d6ad6a91075b65936b151cbf4f9c"
-            ],
-            "index": "pypi",
-            "version": "==20.0.4"
-        },
         "idna": {
             "hashes": [
                 "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
@@ -364,11 +305,11 @@
         },
         "black": {
             "hashes": [
-                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
-                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
+                "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea",
+                "sha256:70b62ef1527c950db59062cda342ea224d772abdf6adc58b86a45421bab20a6b"
             ],
             "index": "pypi",
-            "version": "==19.10b0"
+            "version": "==20.8b1"
         },
         "click": {
             "hashes": [
@@ -627,7 +568,6 @@
                 "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c",
                 "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"
             ],
-            "markers": "python_version < '3.8'",
             "version": "==3.7.4.3"
         }
     }