Added mongodb installation instructions
Added mongodb installation instructions

jomolinare/kobocat,piqoni/onadata,smn/onadata,qlands/onadata,mainakibui/kobocat,GeoODK/formhub,ultimateprogramer/formhub,ehealthafrica-ci/onadata,awemulya/fieldsight-kobocat,eHealthAfrica/onadata,GeoODK/onadata,ehealthafrica-ci/formhub,ehealthafrica-ci/formhub,wesley1001/formhub,piqoni/onadata,hnjamba/onaclone,mainakibui/kobocat,spatialdev/onadata,kobotoolbox/kobocat,wesley1001/formhub,hnjamba/onaclone,mainakibui/kobocat,makinacorpus/formhub,SEL-Columbia/formhub,eHealthAfrica/formhub,GeoODK/onadata,kobotoolbox/kobocat,spatialdev/onadata,piqoni/onadata,makinacorpus/formhub,ehealthafrica-ci/onadata,ehealthafrica-ci/onadata,sounay/flaminggo-test,smn/onadata,qlands/onadata,hnjamba/onaclone,spatialdev/onadata,wesley1001/formhub,ehealthafrica-ci/formhub,makinacorpus/formhub,SEL-Columbia/formhub,GeoODK/onadata,sounay/flaminggo-test,kobotoolbox/kobocat,ultimateprogramer/formhub,qlands/onadata,awemulya/fieldsight-kobocat,eHealthAfrica/formhub,GeoODK/onadata,smn/onadata,sounay/flaminggo-test,jomolinare/kobocat,awemulya/fieldsight-kobocat,qlands/onadata,jomolinare/kobocat,awemulya/fieldsight-kobocat,SEL-Columbia/formhub,ultimateprogramer/formhub,wesley1001/formhub,hnjamba/onaclone,ultimateprogramer/formhub,ehealthafrica-ci/onadata,jomolinare/kobocat,makinacorpus/formhub,eHealthAfrica/formhub,smn/onadata,GeoODK/formhub,mainakibui/kobocat,eHealthAfrica/onadata,GeoODK/formhub,sounay/flaminggo-test,ehealthafrica-ci/formhub,piqoni/onadata,kobotoolbox/kobocat,eHealthAfrica/formhub,spatialdev/onadata,SEL-Columbia/formhub,eHealthAfrica/onadata