Update INSTALL.md
Update INSTALL.md

Add instructions for Docker!
msimonin/OS.js-v2,arduino-org/Arduino-OS,msimonin/OS.js-v2,salman-kamkoriwala/OsJsSample,Rxswyers/OS.js,ellis/OS.js-v2,twkrol/OS.js-v2,arduino-org/OS.js-v2,arduino-org/OS.js-v2,marcinlimanski/OS.js-v2,omet-ca/omet-desktop,arduino-org/Arduino-OS,Rxswyers/OS.js,twkrol/OS.js-v2,andersevenrud/OS.js-v2,codingang/OS.js-v2,Rxswyers/OS.js,dmikey/OS.js-v2,dmikey/OS.js-v2,codingang/OS.js-v2,ellis/OS.js-v2,arduino-org/OS.js-v2,gravityacademy/OS.js-v2,dmikey/OS.js-v2,Rxswyers/OS.js,salman-kamkoriwala/OsJsSample,marcinlimanski/OS.js-v2,ellis/OS.js-v2,andersevenrud/OS.js-v2,msimonin/OS.js-v2,codingang/OS.js-v2,andersevenrud/OS.js-v2,arduino-org/OS.js-v2,codingang/OS.js-v2,salman-kamkoriwala/OsJsSample,msimonin/OS.js-v2,omet-ca/omet-desktop,gravityacademy/OS.js-v2,omet-ca/omet-desktop,arduino-org/Arduino-OS,arduino-org/Arduino-OS,twkrol/OS.js-v2,salman-kamkoriwala/OsJsSample,gravityacademy/OS.js-v2,marcinlimanski/OS.js-v2,ellis/OS.js-v2,andersevenrud/OS.js-v2,Rxswyers/OS.js,twkrol/OS.js-v2,andersevenrud/OS.js-v2,ellis/OS.js-v2,arduino-org/OS.js-v2,salman-kamkoriwala/OsJsSample,msimonin/OS.js-v2,arduino-org/Arduino-OS,codingang/OS.js-v2,dmikey/OS.js-v2,marcinlimanski/OS.js-v2,marcinlimanski/OS.js-v2,dmikey/OS.js-v2,gravityacademy/OS.js-v2,omet-ca/omet-desktop,twkrol/OS.js-v2,omet-ca/omet-desktop,gravityacademy/OS.js-v2