MEAN stack, Win 7, git push heroku master results in sh: bower: not found error

MEAN stack, Win 7, git push heroku master results in sh: bower: not found
error

Can some please advise why I'm getting this error when doing a git push
heroku master on windows 7 for a basic mean stack app? I;m trying a basic
mean stack app and did the following commands before the "git push heroku
master" heroku command cd mean-stack
npm install
pm install -g bower
npm install -g yo grunt-cli bower@0.9.2
bower install
git init
git add .
git status
git add -f public/lib
git commit -m "init"
heroku create
C:\ss\D1\google\04\mean\mean-stack>git push heroku master
Enter passphrase for key
'/c/ss/D1/google/04/eclipse/eclipse/.ssh/id_rsa':
Counting objects: 466, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (448/448), done.
Writing objects: 100% (466/466), 8.61 MiB | 522 KiB/s, done.
Total 466 (delta 55), reused 0 (delta 0)
-----> Node.js app detected
-----> Resolving engine versions
Using Node.js version: 0.10.15
Using npm version: 1.2.30
-----> Fetching Node.js binaries
-----> Vendoring node into slug
-----> Installing dependencies with npm
npm WARN package.json mean@1.0.0 No repository field.
npm http GET https://registry.npmjs.org/express
npm http GET https://registry.npmjs.org/connect-flash
npm http GET https://registry.npmjs.org/mongoose
npm http GET https://registry.npmjs.org/passport
npm http GET https://registry.npmjs.org/passport-local
....
....
npm http GET https://registry.npmjs.org/lru-cache
npm http GET https://registry.npmjs.org/sigmund
npm http 200 https://registry.npmjs.org/sigmund
npm http GET https://registry.npmjs.org/sigmund/-/sigmund-1.0.0.tgz
npm http 200 https://registry.npmjs.org/lru-cache
npm http GET
https://registry.npmjs.org/lru-cache/-/lru-cache-2.3.1.tgz
npm http 200 https://registry.npmjs.org/sigmund/-/sigmund-1.0.0.tgz
npm http 200
https://registry.npmjs.org/lru-cache/-/lru-cache-2.3.1.tgz
> bson@0.1.8 install
/tmp/build_39luvwq9ok8kb/node_modules/connect-mongo/node_modules/mongodb/node_modules/bson
> (node-gyp rebuild 2> builderror.log) || (exit 0)
> kerberos@0.0.3 install
/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/kerberos
> (node-gyp rebuild 2> builderror.log) || (exit 0)
> bson@0.2.2 install
/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/bson
> (node-gyp rebuild 2> builderror.log) || (exit 0)
make: Entering directory
`/tmp/build_39luvwq9ok8kb/node_modules/connect-mongo/node_modules/mongodb/node_modules/bson/build'
CXX(target) Release/obj.target/bson/ext/bson.o
make: Entering directory
`/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/bson/build'
CXX(target) Release/obj.target/bson/ext/bson.o
make: Entering directory
`/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/kerberos/build'
SOLINK_MODULE(target) Release/obj.target/kerberos.node
SOLINK_MODULE(target) Release/obj.target/kerberos.node: Finished
COPY Release/kerberos.node
make: Leaving directory
`/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/kerberos/build'
SOLINK_MODULE(target) Release/obj.target/bson.node
SOLINK_MODULE(target) Release/obj.target/bson.node: Finished
COPY Release/bson.node
make: Leaving directory
`/tmp/build_39luvwq9ok8kb/node_modules/connect-mongo/node_modules/mongodb/node_modules/bson/build'
SOLINK_MODULE(target) Release/obj.target/bson.node
SOLINK_MODULE(target) Release/obj.target/bson.node: Finished
COPY Release/bson.node
make: Leaving directory
`/tmp/build_39luvwq9ok8kb/node_modules/mongoose/node_modules/mongodb/node_modules/bson/build'
> mean@1.0.0 postinstall /tmp/build_39luvwq9ok8kb
> bower install
sh: bower: not found
npm ERR! weird error 127
npm ERR! not ok code 0
! Failed to install --production dependencies with npm
! Push rejected, failed to compile Node.js app
To git@heroku.com:afternoon-spire-6716.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:afternoon-spire-6716.git'