https://docs.docker.com/engine/reference/commandline/login/#credentials-store

+ set +x
#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 751B done
#1 DONE 0.1s

#2 [internal] load metadata for docker.io/library/tomcat:7-jre8
#2 ...

#3 [auth] library/tomcat:pull token for registry-1.docker.io
#3 DONE 0.0s

#2 [internal] load metadata for docker.io/library/tomcat:7-jre8
#2 DONE 0.7s

#4 [internal] load .dockerignore
#4 transferring context: 2B done
#4 DONE 0.1s

#5 [internal] load build context
#5 transferring context: 100.91MB 1.1s done
#5 DONE 1.1s

#6 [ 1/10] FROM docker.io/library/tomcat:7-jre8@sha256:3d6475354578a0b083f2e91700dcb8a1275dc5f574435276ce0ec69be588d6a3
#6 resolve docker.io/library/tomcat:7-jre8@sha256:3d6475354578a0b083f2e91700dcb8a1275dc5f574435276ce0ec69be588d6a3 0.1s done
#6 sha256:cd28622452e8f4e87159dbaf9b33574d08a6bc1910ba99a92f1c1ef185e57145 2.63kB / 2.63kB done
#6 sha256:3037eb7cda68a1ed97df10cd4ff4b5e13df4393b00ea5f16a339a29d3670af2e 15.66kB / 15.66kB done
#6 sha256:3d6475354578a0b083f2e91700dcb8a1275dc5f574435276ce0ec69be588d6a3 1.65kB / 1.65kB done
#6 sha256:221d80d00ae9675aad24913aacbadfac1ce8b7084f9765a6c0813486082c5c69 10.78MB / 10.78MB 0.5s done
#6 sha256:c5e155d5a1d130a7f8a3e24cee0d9e1349bff13f90ec6a941478e558fde53c14 45.34MB / 45.34MB 0.7s done
#6 sha256:4250b3117dca5e14edc32ebf1366cd54e4cda91f17610b76c504a86917ff8b95 4.34MB / 4.34MB 0.2s done
#6 sha256:d1370422ab933b954a9eb1084c61cbc809a78cfd4b44b29c7655838be35a89ee 853.18kB / 853.18kB 0.4s done
#6 sha256:deb6b03222ca22993caacc51c626030ab7d3b6c77c4b326cbbc67a2ed6d70b7b 247B / 247B 0.5s done
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 53.48MB / 122.17MB 1.1s
#6 sha256:9cdea8d70cc391da75da7f047f7cadf87917d7d33b09ac1980457cc855edbf1a 131B / 131B 0.6s done
#6 sha256:04b5c270ac81f84ae2f64eb30d652efc45c3e5b98ed5fa70c51d5dcb1598c016 149B / 149B 0.7s done
#6 extracting sha256:c5e155d5a1d130a7f8a3e24cee0d9e1349bff13f90ec6a941478e558fde53c14 0.3s
#6 sha256:301d76fcab1f6978f819ce3b4ee1dd64953801f94cd0c863d3f1f14ef8c542f6 528.52kB / 528.52kB 0.9s done
#6 sha256:ddf85cd1cc29cbd9d5f0ea3e7754e1e1fe97816c591f97e695c043c533e1c076 10.16MB / 10.16MB 1.0s done
#6 sha256:ef1e6f25e812f6f5e7623260134759a03057bc539859973ba0caea070682dd27 165B / 165B 0.9s done
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 61.87MB / 122.17MB 1.2s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 69.21MB / 122.17MB 1.3s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 80.74MB / 122.17MB 1.5s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 99.61MB / 122.17MB 1.6s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 113.25MB / 122.17MB 1.7s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 122.17MB / 122.17MB 1.8s
#6 sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 122.17MB / 122.17MB 1.9s done
#6 extracting sha256:c5e155d5a1d130a7f8a3e24cee0d9e1349bff13f90ec6a941478e558fde53c14 2.3s done
#6 extracting sha256:221d80d00ae9675aad24913aacbadfac1ce8b7084f9765a6c0813486082c5c69
#6 extracting sha256:221d80d00ae9675aad24913aacbadfac1ce8b7084f9765a6c0813486082c5c69 0.4s done
#6 extracting sha256:4250b3117dca5e14edc32ebf1366cd54e4cda91f17610b76c504a86917ff8b95
#6 extracting sha256:4250b3117dca5e14edc32ebf1366cd54e4cda91f17610b76c504a86917ff8b95 0.1s done
#6 extracting sha256:d1370422ab933b954a9eb1084c61cbc809a78cfd4b44b29c7655838be35a89ee 0.0s done
#6 extracting sha256:deb6b03222ca22993caacc51c626030ab7d3b6c77c4b326cbbc67a2ed6d70b7b done
#6 extracting sha256:9cdea8d70cc391da75da7f047f7cadf87917d7d33b09ac1980457cc855edbf1a
#6 extracting sha256:9cdea8d70cc391da75da7f047f7cadf87917d7d33b09ac1980457cc855edbf1a done
#6 extracting sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91
#6 extracting sha256:968505be14db11ba5984e819eaf7ab354efe0fbcc45025b5dc89bc7073c94c91 5.1s done
#6 extracting sha256:04b5c270ac81f84ae2f64eb30d652efc45c3e5b98ed5fa70c51d5dcb1598c016
#6 extracting sha256:04b5c270ac81f84ae2f64eb30d652efc45c3e5b98ed5fa70c51d5dcb1598c016 done
#6 extracting sha256:301d76fcab1f6978f819ce3b4ee1dd64953801f94cd0c863d3f1f14ef8c542f6 0.0s done
#6 extracting sha256:ddf85cd1cc29cbd9d5f0ea3e7754e1e1fe97816c591f97e695c043c533e1c076
#6 extracting sha256:ddf85cd1cc29cbd9d5f0ea3e7754e1e1fe97816c591f97e695c043c533e1c076 0.3s done
#6 extracting sha256:ef1e6f25e812f6f5e7623260134759a03057bc539859973ba0caea070682dd27 done
#6 DONE 10.2s

#7 [ 2/10] COPY openmrs.war  /usr/local/tomcat/webapps/openmrs.war
#7 DONE 0.5s

#8 [ 3/10] COPY setenv.sh /usr/local/tomcat/bin/setenv.sh
#8 DONE 0.1s

#9 [ 4/10] COPY wait-for-it.sh /usr/local/tomcat/wait-for-it.sh
#9 DONE 0.1s

#10 [ 5/10] COPY startup.sh /usr/local/tomcat/startup.sh
#10 DONE 0.1s

#11 [ 6/10] RUN sed -i '/Connector port="8080"/a URIEncoding="UTF-8" relaxedPathChars="[]|" relaxedQueryChars="[]|{}^\`"<>"' /usr/local/tomcat/conf/server.xml
#11 DONE 0.4s

#12 [ 7/10] RUN chmod +x /usr/local/tomcat/wait-for-it.sh
#12 DONE 0.4s

#13 [ 8/10] RUN chmod +x /usr/local/tomcat/startup.sh
#13 DONE 0.4s

#14 [ 9/10] COPY openmrs-distro.properties /root/openmrs-distro.properties
#14 DONE 0.1s

#15 [10/10] COPY Dockerfile /root/Dockerfile
#15 DONE 0.1s

#16 exporting to image
#16 exporting layers
#16 exporting layers 0.4s done
#16 writing image sha256:a62144fdec90f9af995879c0c301bbe6f735f36c4a7e062a639b295620099ecc done
#16 naming to docker.io/openmrs/openmrs-distro-platform:2.2.2-SNAPSHOT done
#16 DONE 0.5s