demo: don't commit the self signed TLS cert

demo/.cert/server.cert

------BEGIN CERTIFICATE-----
-MIIB+zCCAWSgAwIBAgIJK4ZWtXTSz2GzMA0GCSqGSIb3DQEBCwUAMBwxGjAYBgNV
-BAMTEWRicC1kZXYubG9jYWxob3N0MB4XDTIwMTAyODE0MzAxNVoXDTQ4MDMxNDE0
-MzAxNVowHDEaMBgGA1UEAxMRZGJwLWRldi5sb2NhbGhvc3QwgZ8wDQYJKoZIhvcN
-AQEBBQADgY0AMIGJAoGBAL7Eb+sioAPQxMfHAVY7pzkeMPMsf3oKA9BepNjIXv2z
-FkWMwpH/+UoKyYwYG0lE+aTS26nUgVVXQMtWReUEBKtxFVzQpcbqNy22vS88Jigs
-zIuricui2o9nK46hlVMXI5yDz2lIElFTifxYqrjrpVki+khILldYmlRyoTowrraX
-AgMBAAGjRTBDMAwGA1UdEwQFMAMBAf8wCwYDVR0PBAQDAgL0MCYGA1UdEQQfMB2G
-G2h0dHA6Ly9leGFtcGxlLm9yZy93ZWJpZCNtZTANBgkqhkiG9w0BAQsFAAOBgQCB
-YmWmKGradZOEndfQi/GELG3yqWdxy8wXPHm86V1unvMEkaYaj3svRyYjwob5YaJ5
-GBboxWfYTo1YlzqK37RgythSCylmeEjpMr/dx8o+XdtTnSASNPoGvh5XGReWZKbw
-Z82efBk4FFmIgDFtcZJ/QD7XfAATH5O7o+NS+VPmtg==
------END CERTIFICATE-----

demo/.cert/server.key

------BEGIN RSA PRIVATE KEY-----
-MIICXQIBAAKBgQC+xG/rIqAD0MTHxwFWO6c5HjDzLH96CgPQXqTYyF79sxZFjMKR
-//lKCsmMGBtJRPmk0tup1IFVV0DLVkXlBASrcRVc0KXG6jcttr0vPCYoLMyLq4nL
-otqPZyuOoZVTFyOcg89pSBJRU4n8WKq466VZIvpISC5XWJpUcqE6MK62lwIDAQAB
-AoGBAJ1BQSELwexjRFOK8MctFYQ4JxHONKddahdybWFmiyeHYWyjxCCmadFnYw1h
-Md0MRt5gE0PEMXkwG/GChMtsrItaj9XEK41vlxo0V80kj/QhAUnX00T1RpajX4mI
-pm99ioR8KHyL3akPm5pvUrb+Wl3SvoLvxwfQn2sz5OInrrTBAkEA4p4n3USNqXHa
-NMQmbiGjDPp1qGyOpZkJsIjuIUnyZTSQ8Uxj8vDhkrWmqBUwjLchEXZabkugMsWp
-Y8i6Yer4bQJBANeAV2QdePaZYY4+7oNZvIFCW/L6h11DSRZm+QSY5q9O+8U/nXqc
-uz4/m5SLfqk50+0j1zCJU+dIzbDxyzmgUJMCQQDIzgvU7WH5u4D3MLg87mFkpqqL
-S2Y7JpiHbU5VAQlg1Gt65Y3LP9ciAQRj/CLBDaSnrJAFG84gLzYhzUQab/MhAkBZ
-4/4QE78mVfp8hEGnZqIb5NtH8jrOq0dsYc2TnlfzXmXk9FEzGPd90riJ8NoHqsh8
-zYtwgogOHK84FNPpmLajAkAKbxZk94jR7Rehyzr8n/ptsILJJeyiDoixXrTMerIS
-H/Dvgoby1xgpIwYL99HzxtS9HjL+kSZq4cTY7uGVXbsk
------END RSA PRIVATE KEY-----

demo/.gitignore

+.cert
\ No newline at end of file

demo/yarn.lock

@@ -3272,13 +3272,20 @@ i18next-scanner@^3.0.0:
     vinyl "^2.2.0"
     vinyl-fs "^3.0.1"
 
-i18next@*, i18next@^19.5.1, i18next@^19.8.3:
+i18next@*, i18next@^19.5.1:
   version "19.8.3"
   resolved "https://registry.yarnpkg.com/i18next/-/i18next-19.8.3.tgz#10df7222db8c23389b13bceb9ba67a5e20a0241e"
   integrity sha512-eVrqAw2gGGYYJaJMYw4VM1FNFawLD4b84IsoTZMVXeWHaxAM2gyTa34j2Sip15UkBz/LrSxdFJj0Jhlrz7EvHA==
   dependencies:
     "@babel/runtime" "^7.12.0"
 
+i18next@^19.8.4:
+  version "19.8.4"
+  resolved "https://registry.yarnpkg.com/i18next/-/i18next-19.8.4.tgz#447718f2a26319b8debdbcc6fbc1a9761be7316b"
+  integrity sha512-FfVPNWv+felJObeZ6DSXZkj9QM1Ivvh7NcFCgA8XPtJWHz0iXVa9BUy+QY8EPrCLE+vWgDfV/sc96BgXVo6HAA==
+  dependencies:
+    "@babel/runtime" "^7.12.0"
+
 iconv-lite@0.4.24, iconv-lite@^0.4.4:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
@@ -5483,13 +5490,20 @@ rollup@^0.34.7:
   dependencies:
     source-map-support "^0.4.0"
 
-rollup@^2.18.0, rollup@^2.18.1, rollup@^2.19.0:
+rollup@^2.18.1:
   version "2.33.2"
   resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.33.2.tgz#c4c76cd405a7605e6ebe90976398c46d4c2ea166"
   integrity sha512-QPQ6/fWCrzHtSXkI269rhKaC7qXGghYBwXU04b1JsDZ6ibZa3DJ9D1SFAYRMgx1inDg0DaTbb3N4Z1NK/r3fhw==
   optionalDependencies:
     fsevents "~2.1.2"
 
+rollup@^2.33.3:
+  version "2.34.0"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.34.0.tgz#ecc7f1d4ce2cb88bb51bec2f56b984f3c35b8271"
+  integrity sha512-dW5iLvttZzdVehjEuNJ1bWvuMEJjOWGmnuFS82WeKHTGXDkRHQeq/ExdifkSyJv9dLcR86ysKRmrIDyR6O0X8g==
+  optionalDependencies:
+    fsevents "~2.1.2"
+
 run-parallel@^1.1.9:
   version "1.1.10"
   resolved "https://registry.yarnpkg.com/run-parallel/-/run-parallel-1.1.10.tgz#60a51b2ae836636c81377df16cb107351bcd13ef"