Change apt-key keyserver URL
Change apt-key keyserver URL

Changed keyserver URL for apt-key to hkp://ha.pool.sks-keyservers.net:80 as it is when you install with the get.docker.com script.
The old URL hkp://p80.pool.sks-keyservers.net:80 caused an error about "gnutls_handshake() failed" on apt update.
denverdino/docker.github.io,londoncalling/docker.github.io,sanscontext/docker.github.io,johnstep/docker.github.io,menglingwei/denverdino.github.io,jzwlqx/denverdino.github.io,thaJeztah/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,BSWANG/denverdino.github.io,BSWANG/denverdino.github.io,docker-zh/docker.github.io,sanscontext/docker.github.io,LuisBosquez/docker.github.io,gdevillele/docker.github.io,gdevillele/docker.github.io,denverdino/docker.github.io,anweiss/docker.github.io,joeuo/docker.github.io,docker-zh/docker.github.io,LuisBosquez/docker.github.io,BSWANG/denverdino.github.io,londoncalling/docker.github.io,phiroict/docker,JimGalasyn/docker.github.io,shin-/docker.github.io,joeuo/docker.github.io,joaofnfernandes/docker.github.io,jzwlqx/denverdino.github.io,londoncalling/docker.github.io,anweiss/docker.github.io,JimGalasyn/docker.github.io,bdwill/docker.github.io,menglingwei/denverdino.github.io,JimGalasyn/docker.github.io,jzwlqx/denverdino.github.io,LuisBosquez/docker.github.io,denverdino/denverdino.github.io,shubheksha/docker.github.io,alexisbellido/docker.github.io,shubheksha/docker.github.io,jzwlqx/denverdino.github.io,docker/docker.github.io,gdevillele/docker.github.io,alexisbellido/docker.github.io,phiroict/docker,aduermael/docker.github.io,sanscontext/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,gdevillele/docker.github.io,docker/docker.github.io,joeuo/docker.github.io,denverdino/docker.github.io,johnstep/docker.github.io,joaofnfernandes/docker.github.io,shubheksha/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,joaofnfernandes/docker.github.io,aduermael/docker.github.io,docker/docker.github.io,sanscontext/docker.github.io,joaofnfernandes/docker.github.io,aduermael/docker.github.io,denverdino/denverdino.github.io,thaJeztah/docker.github.io,denverdino/denverdino.github.io,shin-/docker.github.io,shin-/docker.github.io,londoncalling/docker.github.io,sanscontext/docker.github.io,docker-zh/docker.github.io,phiroict/docker,LuisBosquez/docker.github.io,denverdino/denverdino.github.io,phiroict/docker,menglingwei/denverdino.github.io,johnstep/docker.github.io,denverdino/denverdino.github.io,alexisbellido/docker.github.io,johnstep/docker.github.io,joaofnfernandes/docker.github.io,shubheksha/docker.github.io,docker-zh/docker.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,bdwill/docker.github.io,JimGalasyn/docker.github.io,jzwlqx/denverdino.github.io,alexisbellido/docker.github.io,alexisbellido/docker.github.io,docker/docker.github.io,joeuo/docker.github.io,bdwill/docker.github.io,BSWANG/denverdino.github.io,LuisBosquez/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,bdwill/docker.github.io,denverdino/docker.github.io,joeuo/docker.github.io,menglingwei/denverdino.github.io,anweiss/docker.github.io,phiroict/docker,shin-/docker.github.io,docker-zh/docker.github.io,shubheksha/docker.github.io,bdwill/docker.github.io,menglingwei/denverdino.github.io,gdevillele/docker.github.io,shin-/docker.github.io,aduermael/docker.github.io